How to sort Map values by key in Java?

Question

I have a Map that has strings for both keys and values.

Data is like following:

\"question1\", \"1\"
\"question9\", \"1\"
\"que

Answer 1

Using the TreeMap you can sort the map.

Map map = new HashMap<>();        
Map treeMap = new TreeMap<>(map);
for (String str : treeMap.keySet()) {
    System.out.println(str);
}